Quote: Originally Posted by CFlux
if you think that a car batery can't hurt you then by all means touch both terminals. It's current that'll get you, a car battery even though it is only 12 volt is more then able to supply enough current to stop your heart.
I've touched both terminals of a car battery. I felt nothing. However, I've had several zaps from the business end of the ignition coil. You only need to get zapped by that a few dozen times before you learn your lesson.
The thing is, people are fairly resistant. (I know I am) Unless you're soaking in salt water or sweat, your resistance is probably in the mega-ohms.
So, car battery = 12 volts. Person = 1,000,000 ohms resistance. If I touch both terminals of a car battery - 12 / 1000000 = 0.000012 amps of current. That's not enough to feel. However, the secondary windings on an ignition coil are over 30,000 volts. 30,000/1,000,000=0.03 amps. That can hurt.
Believe me, I've thought of many ways to protect my car. It was broken into/attempted stolen six times in two years, while parked in a "secured" underground parking lot.
Good luck,
Kris